Funding for this research was provided by:
National Key Research and Development Program of China (2016YFC1000203, SQ2017YFSF080041)
National Natural Science Foundation of China (81671412, 81661128010)
National Natural Science Foundation of China (81490742)
Medical Crossover Foundation of Shanghai Jiaotong University (YG2015MS42)
Text and Data Mining valid from 2018-06-19
Received: 28 December 2017
Accepted: 15 May 2018
First Online: 19 June 2018
Ethics approval and consent to participate
: Ethical approval for the study (GSZLW(2015)20) was obtained from the local ethics committee to conduct the research in the following participating centers including International Peace Maternity and Child Health Hospital, Women’s Hospital of Zhejiang University, Qingdao Women and Children’s Hospital, Jiangxi Maternal and Child Health Hospital, and Jiaxing Maternity and Child Health Care Hospital. Written informed consent was obtained from each participant before inclusion.
: The authors declare that they have no competing interests.
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